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KVM: x86: emulator: Return to user-mode on L1 CPL=0 emulation failure

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On this case, handle_emulation_failure() fills kvm_run with
internal-error information which it expects to be delivered
to user-mode for further processing.
However, the code reports a wrong return-value which makes KVM to never
return to user-mode on this scenario.

Fixes: 6d77dbfc88 ("KVM: inject #UD if instruction emulation fails and exit to
userspace")

Signed-off-by: Liran Alon <[email protected]>
Reviewed-by: Nikita Leshenko <[email protected]>
Reviewed-by: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
Reviewed-by: Wanpeng Li <[email protected]>
Signed-off-by: Radim Krčmář <[email protected]>
This commit is contained in:
Liran Alon 2017-11-05 16:56:33 +02:00 • committed by Paolo Bonzini
commit 1f4dcb3b21
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/x86.c
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@ -5433,7 +5433,7 @@ static int handle_emulation_failure(struct kvm_vcpu *vcpu)
vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
vcpu->run->internal.ndata = 0;
r = EMULATE_FAIL;
r = EMULATE_USER_EXIT;
}
kvm_queue_exception(vcpu, UD_VECTOR);